Granted Patent B2

US 12,385,253 · App. 18/491,904 · Granted Aug 12, 2025

Inventors: Jiansheng Tang (Westfield, IN); Michael J. Hubbard (Goshen, IN); Joseph Kalwara (Indianapolis, IN); Carl E. Watkins, Jr. (Mount Juliet, TN); Brian Alexander (Westfield, IN); Todd D. Taykowski (Lebanon, TN); Joseph R. Carr (Indianapolis, IN)

Assignee: Holcim Technology Ltd

E04D5/148B32B5/022B32B5/24B32B7/12B32B25/04B32B25/10B32B27/06B32B27/12B32B27/32E04D5/06E04D5/08B32B2262/0284B32B2262/101B32B2419/06

Abstract

Claims (12)

1. A method for preparing a membrane composite, the method comprising: (i) providing an EPDM roofing membrane panel having opposed first and second planar surfaces; (ii) providing a UV-curable polyacrylate composition, wherein the UV-curable polyacrylate includes monomeric units defined by the formula:

where each R 1 is individually hydrogen or a hydrocarbyl group and each R 2 is individually a hydrocarbyl group, where R 2 is an alkyl group having at least 4 carbon atoms; (iii) providing a fabric; (iv) applying the UV-curable polyacrylate composition to the first planar surface of the EPDM membrane to thereby form a laminate that includes a layer of UV-curable polyacrylate and a layer of EPDM roofing membrane panel; (v) subjecting the layer of UV-curable polyacrylate to UV radiation to thereby form a cured laminate that includes a layer of cured polyacrylate and a layer of EPDM roofing membrane panel, where the layer of cured polyacrylate is a pressure-sensitive adhesive; and (vi) mating the layer of fabric to the layer of cured polyacrylate to thereby form the membrane composite.

2. The method of claim 1 , where the UV-curable polyacrylate consists essentially of monomeric units defined by the formula:

where each R 1 is individually hydrogen or a hydrocarbyl group and each R 2 is individually a hydrocarbyl group, where R 2 is an alkyl group having at least 4 carbon atoms.

3. The method of claim 1 , where the UV-curable polyacrylate consists of monomeric units defined by the formula:

where each R 1 is individually hydrogen or a hydrocarbyl group and each R 2 is individually a hydrocarbyl group, where R 2 is an alkyl group having at least 4 carbon atoms.

4. The method of claim 1 , where the fabric is a polyester fleece.

5. The method of claim 4 , where the EPDM membrane panel meets the specifications of ASTM D-4637.

6. The method of claim 5 , where the polyester fleece has a thickness of from about 0.5 to about 4.0 mm and a basis weight of at least 70 g/m 2 .

7. The method of claim 1 , where said step of applying includes applying the UV-curable polyacrylate composition across the entire width of the first planar surface of the membrane panel.

8. The method of claim 2 , where R 1 is hydrogen and R 2 is selected from the group consisting of butyl, 2-ethylhexyl, and mixtures thereof.

9. The method of claim 8 , where the polyacrylate is a copolymer including monomeric units of the formula where R 2 is butyl and monomeric units of the formula where R 2 is 2-ethylhexyl.

Assignments (3)

Continuity (3)

References Cited (178)